Third one down on the left looks wrong, there is too much inconsistancy in your 'slash' its black when its on white (fine) the white on colour/black (fine) then white on white, white on black...seems too inconsistant
Also, it looks wrong only the 'r' is effected in that design as it looks accidental.
All the logos look fairly unoriginal except the top one, i would on that one and improving it, its over compersition is nice, not too sure about whether you should line up shield and the grey text, also fading the text towards the bottom looks too soft, should be sharper i think.
I hope this is ok, its intended as constructive.